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MOD 8: Lecture 1

TMJ

QuestionAnswer
these bony processes are all part of what TMJ bone... Postglenoid spineMandibular fossaArticular eminenceArticular crestArticular tubercle temporal bone
these bony processes are all part of what TMJ bone... Medial poleLateral poleHead, neck, body, teethRamusCoronoid process mandible
Positioned between mandibular condyle and temporal bone – Divides into superior and inferior compartments articular disk
What are the three bands of the articular disk called? Anterior (pes mensicus)Intermediate (pars gracilus)Posterior (pars posterior)
What type of tissue is the articular disk made up of? Dense fibrous connective tissue
What are the medial and lateral attachments of the articular disk? Attached to medial and lateral poles by medial and lateral collateral ligaments
What are the posterior superior parts of the articular disk attached to? superiopr lamina or stratum
What are the posterior inferior disc attaches to? inferior lamina or stratum
What does the anterior portion of the disc attach to? Anterior attachment to capsule and superior fibers of the superior lateral pterygoid
What does the superior part of the joint capsule of the TMJ attach to? rim of temporal articular surfaces
What does the inferior part of the joint capsule of the TMJ attach to? condylar neck
Which part of the capsule becomes TMJ ligament? lateral part
The anterior part of the TMJ capsule blends with the anterior disk and what muscle? lower head of external pterygoid
What does the posterior capsule attach near? attaches near postglenoid spine
What is the TMJ innervated by? Auriculotemporal branch of 3rd division of trigeminal nerveMasseteric nervePosterior deep temporal nerve
What happens during phase 1 of mandibular depression? Rotation for first 10-15 mm before mandibular opening enters next phase
What happens during phase 2 of mandibular depression? Anterior translation of the condyle. Allow for functional opening of 40 mm
What happens during protrusion? Bilateral anterior condylar translation
What happens during lateral excursion? Anterior translation on contralateral side and spin on ipsilateral side
At the end of phase 1, what position is the disk in? the disc is more posteriorly rotated position in relation to condyle
What are the two theories in regard to the arthrokinematics of phase 2? Superior stratum becomes tight as the condyle and disc translate anterior ORDisc is affected by its own self-seating, disc is rotated further posteriorly on condyle
Phase 1 for treatment of TMJ disorders Inflammatory conditions, Part A/B
Phase 2 for treatment of TMJ disorders Cervical spine disorders causing inflammatory process.
Phase 3 for treatment of TMJ disorders Intraoral appliance to treat inflammation.
Phase 4 for treatment of TMJ disorders Anterior repositioning appliance.
Phase 5 for treatment of TMJ disorders Manual intraoral techniques to restore mandibular dynamics.
Phase 6 for treatment of TMJ disorders Arthroscopy to restore translation between disc and temporal bone.
Phase 7 for treatment of TMJ disorders Open joint surgery.
Created by: PTROCKS